[horizontal-pod-autoscalers] Add chart

.github/workflows/helm-charts-test.yaml

@@ -39,7 +39,9 @@ jobs:
       - name: Prepare library charts
         run: |
           cp charts/cron-jobs/library-ci/*.yaml charts/cron-jobs/templates/
+          cp charts/horizontal-pod-autoscalers/library-ci/*.yaml charts/horizontal-pod-autoscalers/templates/
           sed -i 's/library/application/g' charts/cron-jobs/Chart.yaml
+          sed -i 's/library/application/g' charts/horizontal-pod-autoscalers/Chart.yaml
 
       - name: Test charts
         uses: helm/[email protected]

README.md

@@ -14,6 +14,7 @@ Opinionated helm chats for my personal projects, and OSS Projects that either do
 ### Library
 
 * [`cron-jobs`](https://artifacthub.io/packages/helm/wyrihaximusnet/cron-jobs)
+* [`horizontal-pod-autoscalers`](https://artifacthub.io/packages/helm/wyrihaximusnet/horizontal-pod-autoscalers)
 
 ## Opinionated decisions shared by all charts
 

charts/horizontal-pod-autoscalers/.helmignore

@@ -0,0 +1,22 @@
+# Patterns to ignore when building packages.
+# This supports shell glob matching, relative path matching, and
+# negation (prefixed with !). Only one pattern per line.
+.DS_Store
+# Common VCS dirs
+.git/
+.gitignore
+.bzr/
+.bzrignore
+.hg/
+.hgignore
+.svn/
+# Common backup files
+*.swp
+*.bak
+*.tmp
+*~
+# Various IDEs
+.project
+.idea/
+*.tmproj
+.vscode/

charts/horizontal-pod-autoscalers/Chart.yaml

@@ -0,0 +1,10 @@
+apiVersion: v2
+name: horizontal-pod-autoscalers
+description: Horizontal Pod Autoscalers library
+home: https://github.com/wyrihaximusnet/helm-charts
+icon: https://helm.wyrihaximus.net/images/charts/horizontal-pod-autoscalers.png
+type: library
+version: 0.1.0
+maintainers:
+  - name: WyriHaximus
+    email: [email protected]

charts/horizontal-pod-autoscalers/README.md

@@ -0,0 +1,29 @@
+# Horizontal Pod Autoscalers
+
+<p align="center">
+  <img src="https://helm.wyrihaximus.net/images/charts/horizontal-pod-autoscalers.png">
+</p>
+
+Opinionated helm library chart for easy creation of horizontal pod autoscalers.
+
+# Example
+
+Very basic example that uses the current apps fullname and replica count as minimum replicate count, defaults to 1024 as the max replica count:
+
+```gotemplate
+{{- include "horizontal-pod-autoscalers.hpa" (dict "name" (include "default-backend.fullname" .) "replicas" (dict "min" .Values.replicas)) -}}
+```
+
+The following configuration options are available:
+
+```yaml
+name: your-applications-deployment-name # Required, this MUST match the deployment we're autoscaling
+replicas:
+    min: 2 # Optional, defaults to 2, but strongly suggest making it match the deployment replica count
+    max: 1024 # Optional, defaults to 1024
+```
+
+## Opinionated decisions
+
+* 1024 max replica's
+* scales when average CPU usage goes above 50%

charts/horizontal-pod-autoscalers/ci/hpa.yaml

@@ -0,0 +1 @@
+replicas: 2

charts/horizontal-pod-autoscalers/library-ci/hpa.yaml

@@ -0,0 +1,48 @@
+---
+apiVersion: apps/v1
+kind: Deployment
+metadata:
+  name: default-backend
+  labels:
+    app: default-backend
+spec:
+  selector:
+    matchLabels:
+      app: default-backend
+  replicas: {{ .Values.replicas }}
+  template:
+    metadata:
+      annotations:
+        prometheus.io/scrape: "true"
+        prometheus.io/port: "9696"
+      labels:
+        app: default-backend
+    spec:
+      containers:
+        - name: default-backend
+          image: "wyrihaximusnet/default-backend:random"
+          imagePullPolicy: Always
+          ports:
+            - name: default-backend
+              containerPort: 6969
+              protocol: TCP
+            - name: metrics
+              containerPort: 9696
+              protocol: TCP
+          livenessProbe:
+            failureThreshold: 6
+            httpGet:
+              path: /
+              port: metrics
+          readinessProbe:
+            failureThreshold: 6
+            httpGet:
+              path: /
+              port: metrics
+          startupProbe:
+            httpGet:
+              path: /
+              port: metrics
+            failureThreshold: 90
+            periodSeconds: 1
+{{ include "horizontal-pod-autoscalers.hpa" (dict "name" "default-backend" "replicas" (dict "min" .Values.replicas)) }}

charts/horizontal-pod-autoscalers/templates/_hpa.yaml

@@ -0,0 +1,21 @@
+{{- define "horizontal-pod-autoscalers.hpa" }}
+---
+apiVersion: autoscaling/v2beta2
+kind: HorizontalPodAutoscaler
+metadata:
+  name: {{ .name }}
+spec:
+  scaleTargetRef:
+    apiVersion: apps/v1
+    kind: Deployment
+    name: {{ .name }}
+  minReplicas: {{ .replicas.min | default 2 }}
+  maxReplicas: {{ .replicas.max | default 1024 }}
+  metrics:
+    - type: Resource
+      resource:
+        name: cpu
+        target:
+          type: Utilization
+          averageUtilization: 50
+{{- end }}